AR106中温固化圆网制版感光胶应用研究

本文研究了ＡＲ１０６中温固化圆网制版感光胶的应用条件，并将其在１２０℃、１ｈ固化条件下制得的花纹与国外某名牌产品在１８０℃、２ｈ下制得的花纹进行了对比，其耐化学药剂及耐磨性能，均优于后者。若将ＡＲ１０６固化温度提高为１６０℃，则固化时间可缩短至３０ｍｉｎ。     

AR107高目数圆网感光胶制作精细花型

重点介绍了上海中大公司的ＡＲ１０７高目数圆网感光胶在生产精细花型时的使用要点，详细说明了感光胶的配比，涂胶时间，涂胶量，不同目数的圆网曝光量及显影焙烘要求，实践证明，ＡＲ１０７可以替代进口感光胶。     

一种高效双刮刀圆网涂胶装置

在圆网印花行业中，圆网涂感光胶工艺20多年来一直沿用荷兰STORK公司的浸润式涂胶技术。用胶量多，速度慢，效率低，许多厂不得不增加涂胶机来满足生产的需要。最近我们开发研制的双刮刀涂胶装置，涂胶机不做任何改动装上该装置可以使涂胶速度提高10倍，用胶量减少2／3。制网质量明显提高，经印染厂使用经济效益十分明显。     

国产AR106中温固化感光胶的应用

随着圆网印花技术的不断提高和改进,要求圆网制版与之相适应。作为制版过程中的关键之一,感光乳胶的性能、配制和合理应用越来越受到人们的重视。目前印染行业所使用的感光乳胶有进口和国产两大类,这两大类,又分别为高粘度型和适中型。 高粘度型 进口有德国生产的RU、96X、200C、300D以及奥地利、意大利等产品;国内则有上海AR 105、AR 106、AR 107,北京英格兰CPR—1型、CPR—2型,烟台BSR型和郑州等地生产的产品。以上感光胶的粘度大大超过了圆网制版使用范围,需加一定比例的蒸馏水调制后方可使用。     

平网制版感光胶的应用案例

简要分析了平网制版感光胶的化学组分。列举了10项平网制版感光胶的应用案例，分析了产生各种问题的原因，提出了相应的解决方法。     

JF202—1高粘度平网制版感光胶的应用

对JF202－1高粘度平网制版感光胶在毛绒制品印花工艺上的使用要点进行了分析探讨,具体介绍了该感光胶的性能、特点及其工艺过程。     

圆网印制高技花样的探索（二）

2.3制版操作 影响制版的质量因素包括网坯的复圆清洁、感光胶的质量和上胶厚薄均匀度、曝光时间等,圆网两端闷头的质量也常会影响到对花精度,进而造成对花不良,影响印花织物的外观实物水平。 目前常用的感光胶有:     

圆网制版工艺

介绍了圆网印花设备特点、圆网规格与选择、圆网制版工艺流程及制版过程中应注意的事项.为降低圆网印花成本,提出了圆网的循环利用新技术,如采用圆网高温固化膜剥离工艺,并介绍了高温固化膜剥离的工艺流程及其特点.     

国产精细花型制版感光胶通过鉴定

上海市高新技术企业上海中大印染材料工业有限公司研制开发成功JR107圆网精细花型制版感光胶和JF201单液型平网制版感光胶,上海市科委于1999年1月28日在该公司现场主持召开了产品鉴定会.     

SL40系列双组分平网制版感光胶

介绍了色浪SL404、404-1、405系列双组分水性平网制版感光胶的性能特点，并与国内外同类产品进行对比；试验了目前常用的印花网版擦洗用溶剂，发现环己酮或酒精总体效果较好。分析了网版制作中的技术要点，包括上胶厚度、曝光显影时间、二次曝光、坚膜处理等，指出了工艺中的注意事项。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the